Bring the diverse and unique aquatic ecosystems of the Great Rift Lakes of Africa to your aquarium with the Nautilus Tan River Kit. This all-in-one kit includes a carefully curated mix of warm-toned substrate, distinctive perforated stones, and nutrient-rich plant substrate — perfect for recreating biotopes of African lakes, estuarine, and rocky shoreline environments.

At the heart of the Nautilus Tan kit is the Hole Stone — a unique sedimentary rock with warm, gritty tones and distinctive natural perforations of varying sizes that create functional caves and shelters for cichlids and other lake-dwelling species, while providing perfect anchoring points for epiphytic plants. The kit includes a full range of Hole Stone sizes from XL down to small, alongside a 2 kg bag of Hole Nano Rocks for foreground detail and intricate rock formations. The warm Artist Mustard plant substrate — a 5 kg nutrient-rich growing medium — provides a natural sandy-gold foundation that evokes the sun-baked lakebeds of East Africa, while the Nautilus Tan Biotope Beds add authentic fine substrate character.

The result is a warm, textured, cave-rich landscape perfect for African cichlid biotopes, rocky lake shorelines, or any layout that calls for natural sheltering structures and a warm, sunlit aesthetic.

One Universal River Kit. Infinite Aquascapes.

Your WIO River Kit is the ultimate canvas for global aquatic artistry. Designed as a Universal Base, it distills the raw beauty and soul of rivers, lakes, and streams worldwide — so you can create with freedom, not limits. Craft a stunning aquascape or transform it into a lush biotope with region-specific flora, fauna, and botanicals. It's that simple. Just boundless creativity.

Dream aquascapes or wild biotopes — achieving them has never been this simple, this versatile, this uniquely WIO.

Kit Contents (Mega Box)

• Hole Stone: 1x XL, 2x L, 3x M, plus mix S assortment
• Hole Nano Rock: 2 kg bag
• Nautilus Tan Biotope Beds: 2 kg bag of natural biotope substrate
• Artist Mustard: 5 kg bag of nutrient-rich plant substrate

Key Points

• Warm tan palette with distinctive perforated Hole Stone — evokes Great Rift Lake rocky shorelines
• Natural perforations provide shelter for cichlids and anchoring for epiphytic plants
• Includes full range of Hole Stone sizes for natural depth and cave-rich formations
• Hole Nano Rocks add fine foreground detail and intricate rock structures
• Artist Mustard plant substrate supports healthy plant growth
• Ideal for African cichlid biotopes, Lake Tanganyika and Malawi-inspired scapes
• 1 kit for tanks up to 60 cm / 2 kits for tanks 75–90 cm / 3 kits for tanks 90–120 cm
• Total kit weight: 16–20 kg
• Safe for fish, shrimp, and other aquatic animals

*Pieces, colours, sizes and shapes of stones may vary. Plants not included.

Available from Cuboid Nature Aquarium — Authorized Retailer for WIO.